One of the most important parts of the LHP is the porous wick which provides the capillary force to circulate the working fluid. To achieve good thermal performance, capillary wicks with high permeability and porosity and fine pore radius are expected. Unfortunately, there are only few papers in the literature describing with details the fabrication of wicks adapted to LHPs. The objective of the present work is to develop the machining procedure and tool for LHP porous wicks, and to develop the assembling methods for a complete LHP evaporator equipped with this capillary structure. The wick porosity is estimated by the weight method and the pore size is determined using Scanning Electronic Microscopy and Confocal Microscopy. The effects of the sintering temperature, sintering time, speed of temperature rise, powder size and powder type, powder vibration are investigated. The optimum wick properties - porosity of 65-70%, pore diameter of 8-9 μm - are obtained by sintering a nickel type 2 powder at 0.6 time the melting temperature, for 20 minutes. A cylindrical capillary structure was fabricated and inserted into the evaporator body. The experimental tests of this LHP are in progress.